Engraveb s spoon-clamp



F. W. CROCKER.

BNGRAVERS SPOON ULAMl?. y APPLICATION FILED 001731908.

4 909,759. A Patented Jan.12,19o9. 111 .l,

FRED w. caociinitfoii NoiiTiiiiriMoeE, onto.

ENGRAVERS SPOON-CLAMP.

Speccaton of Letters Patent.

Patented Jan. 12, 19Q9.

Application led October 7, 190i?. Serial No. 456,527.

To all whom 'it "may concern:

Be it known that I,FRED W. CROGKER, citizen of the United States,residing `at North Baltimore, in the county of Wood and State of Ohio,have invented certain new and useful Improvements in EngraversSpoon-Clamps, of which the following is a specification.

This invention relates to engravers implements, and especially toimprovements in clamping-jaws for holding spoons during engraving.

This invention is the result of improvements upon my Patent No. 900,148issued October 6th, 1908, and is designed to simplify the means forholding and adjusting the clamping-j aws shown in said patent.

The object of the invention is to provide a clamping-jaw of suchpeculiar construction as to permit a pair of such jaws to be adjusted tolit spoons of various sizes and shapes, and to be operated to hold thespoons in clamped position for the purpose of engraving.

Ay further object of the invention is to provide spoon clamping-jawsadapted to be worked on a plate or key in adjusting the jaws for holdingspoons, preparatory to fixing the jaws in clamped position.

A still further object of the invention is to provide clamping-jawshaving a slot parallel with the base of the jaws and eX- tendinginwardly from the face of the jaws and forming a seat or bearing for asuitable plate or keyY upon which the jaws are operated.

With these objects in view the invention consists of a pair of jawsprovided with a serrated edge or rack fory the usual pins or stops of anengravers clamping-block, and having a spoon-seat, and a lateral slotunder the seat forming a curved bearing, and a suitable plate fittingthe slots for the adjustment of the jaws thereon, and for preventingvertical movement of the jaws in a clamping operation.

In the accompanying drawings forming part of this application: Figure lis a top view showing the application'of the holder. Fig. 2 is a topview of the jaws and connecting plate or key showing in dotted linesvarious positions of the jaws on the plate.-

Fig. 3 is an elevation'looking at the inner face of a jaw. Fig. 4 is across section taken on the line m-, F ig. 2. Fig. 5 is a transversesectional view of one ofthe jaws taken a l on the line y-/,lfig 3.

The same reference numerals denote the same parts `throughout theseveral views of the drawings.

In this class of work-clamps, and especially such as employ loose jawsor jaws which are not attached or permanently fixed to theclamping-block, it has been found that such jaws are raised, -tilted orotherwise disarranged in a clamping operation, and that in clamping thebowl of a spoon it is diliicult to keep the jaws properly seated on theclamping block without employing bolts, clamps or similar devices whichinvariably interfere with the workman. It is therefore the purpose ofthis invention to overcome such disadvantages and objections, and tofurnish simple and inexpensive means convenient of operation whereby thejaws may be made to retain their seat on the clam ing-block duringclamping operation witiiout employing the usual devices. It is wellknown that such holders or clamping-jaws should be made in such manneras to assist an engraver in his work and with as little obstruction orinterference with work and workman as possible. The construction of thejaws hereinafter particularly described and the means by which they areconnected together in a clamping operation will be found to accomplishthese ends.

For the purpose of exemplifying the invention, an ordinary engraversblock 1, having a clamping-screw 2, and the usual perforated head 3provided with stop-pins or pegs 4, is employed.

The spoon seat 5 and lip 6 of the jaws 7 are the salne as shown in myaforesaid patent, and the jaws being alike only one of them will bedescribed in detail.

The outer edge of the jaw-base 8 is serrated, notched, racked orprovided with teeth 9, which the pins 4 engage preparatory to clamping aspoon between the jaws by operating the clamping-screw 2, to preventbackward movement of the jaws.

A slot l() extends from the inner faceof the jaw under the spoon-seatparallel with the jaw-base and terminates in a semi-elliptical or curvedbase 11 opposite the teeth 9.

The edge of the spoon-bowl fits under the lips 6, so that in a clampingoperation it is necessary to provide means to prevent the jaws raisingor tilting up from the blockhead,y and this means consist of anelliptical i plate 12 fitting the slots l0 of each jaw and forming aconnection or key between the` aws. J It is obvious that the jaws may bemoved or slid about, back and forth on the plate 12 to adjust andposition them for holding a 'spoon-bowl, and that the plate counteractsthe clamping pressure of the jaws on the spoon and prevents vertical"movement of the jaws in a clampingoperation.

Having thus described my invention, what I claino as new and desiretosecure by Letters Patent is:

l. The combination with an engravers clamping-block having suitablestop-pins, of a pair of vela1nping-jaws having a seat fora spoon-bowland a serrated edge engaged by said pins, a slot extending from theinner face of each jaw under said seat, and a plate iitting the slots toprevent vertical inove-r ment of the jawsin a clamping operation.

2. The combination with a clamping-.block having means for attaching'clamping-jaws thereto, and the said jaws each having a slot extendingfrom the inner face thereof, of an elliptical platetting the slots forthe purpose of keeping the said faces parallel during a clampingoperation.

3. A clamping-jaw of the character deyscribed havingv aserrated outeredge, a spoon-bowl seat, a slot extending from the inner faceof the jawunder the said seat and terminating in a curved base opposite theserrated edge, combined with a like jaw, and a plate fitting `said jawslots to parallel the clamping faces of the jaws.

" In witness whereof I hereunto set my hand in the presence of tvvowitnesses.

FRED .WL CRooKnn.

